Darth Vader working lightsaber for baby

This is the lightsaber i made for my 2 years old baby.

What you need:
print the thing. the thing contains the printing support.
1 acrilic tube 20mm external diameter and 16mm internal diameter
1 button max 13x13x8 mm
2 AA batteries.
1 M3 screw to keep the acrilic tube.
wire for the connection.

You have to mount it as shown in the figure, then i mounted 15 red leds but you can mount the led you want working with 3 volt.

Then i put a white sheet between leds to diffuse the light.